Tennessee Sen. Bob Corker (R) said President Trump "has not demonstrated that he understands the character of this nation" in grave comments delivered at the Rotary Club of Chattanooga on Thursday. "The president has not yet been able to demonstrate the stability nor some of the competence that he needs to ... in order to be successful. And we need for him to be successful," Corker said.

The senator pointedly added that Trump does not appear to understand "what has made this nation great...